High School Applied Mechanics -- Billiard Balls

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Efren "Bata" Reyes showcases exceptional skill in managing elastic collisions in billiards, demonstrating a level of precision that appears almost luck-based but is consistently reproducible. Observers note that his ability to control the trajectory of billiard balls during play is remarkable. A participant mentions having seen an even more impressive clip of Reyes but is unable to locate it. The discussion highlights the complexity of billiard physics, particularly in scenarios involving moving balls. Overall, Reyes's talent exemplifies the intricate mechanics of billiards.
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Efren "Bata" Reyes demonstrates his superhuman precision in managing elastic collisions. It may look like luck but he does this sort of thing consistently. I've seen one that's even more amazing but have lost track of it.

 
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Here's another good one.



The clip I can't find is similar but the ball he uses for deflection is also moving.
 
For simple comparison, I think the same thought process can be followed as a block slides down a hill, - for block down hill, simple starting PE of mgh to final max KE 0.5mv^2 - comparing PE1 to max KE2 would result in finding the work friction did through the process. efficiency is just 100*KE2/PE1. If a mousetrap car travels along a flat surface, a starting PE of 0.5 k th^2 can be measured and maximum velocity of the car can also be measured. If energy efficiency is defined by...

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